From 96317854c8ed385b2091ede209915e90e8a0044c Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@linux.intel.com>
Date: Tue, 10 Feb 2009 18:05:21 +0000
Subject: [PATCH] [behaviour] Do not notify empty behaviours

If a behaviour does not have actors associated to it then it should
not invoke the ::alpha_notify() implementation.
---
 clutter/clutter-behaviour.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clutter/clutter-behaviour.c b/clutter/clutter-behaviour.c
index 6cb543fba..e507c5d9b 100644
--- a/clutter/clutter-behaviour.c
+++ b/clutter/clutter-behaviour.c
@@ -531,6 +531,10 @@ notify_cb (GObject          *object,
 
   CLUTTER_NOTE (BEHAVIOUR, "notify::alpha");
 
+  /* no actors, we can stop right here */
+  if (behave->priv->actors == NULL)
+    return;
+
   if (klass->alpha_notify)
     {
       gdouble alpha_value = clutter_alpha_get_alpha (behave->priv->alpha);